Accession Number:

ADA139263

Title:

Environmental Control System Concept Study for a Type a V/STOL Aircraft.

Descriptive Note:

Final rept.,

Corporate Author:

GRUMMAN AEROSPACE CORP BETHPAGE NY

Personal Author(s):

Report Date:

1980-04-01

Pagination or Media Count:

79.0

Abstract:

Energy-efficient closed-loop air and vapor cycles, rotary-vaned positive-displacement air cycle machinery, partial closed-loop air cycles Shoestring Systems, and advanced centrifugal machinery with high-speed electric motor drives show promise for advancing the state-of-the-art in aircraft Environment Control Systems ECS design. This report presents study results to identify the benefits of this advanced ECS technology when applied to subsonic Navy VSTOl aircraft. Results show that the use of bleed air driven turbo-machines with partial recirculation of used cooling air back to the turbomachinery Shoestring System leads to the lowest overall system takeoff gross weight penalty to the aircraft and to the lowest life cycle costs. For this system, the total life cycle cost penalty decreased with decreasing avionic function temperatures between 115 and 80 C, and then increased rapidly at junction temperatures lower than 80 C.

Subject Categories:

  • VSTOL
  • Air Conditioning, Heating, Lighting and Ventilating
  • Hydraulic and Pneumatic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE